Upgrade to the latest version of Adobe InDesign

Hi Experts,
I tried to open InDesign CS5.5 document with InDesign CS5. But I received an error message indicating that “Cannot open ‘IDCS55.indd”. It also suggests that “Please upgrade your plug-ins to their latest versions, or upgrade to the latest version of Adobe InDesign”.
If you have any idea regarding this issue please help me.
Thanks in advance.

